• 한국철도학회논문집
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• 제9권4호
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• pp.504-509
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• 2006

Currently, most of TDIS(Train Destination Indicator System) is operated colored-LED type equipment in Korea. This current LED type TDIS equipment has not graceful display and causes passenger's fatigues because of the LED module inherent characteristics as a display light source, high power consumption, high operating and maintenance costs, and et al. To address these several, we are developed new colored-LCD type TDIS equipment. According to our developed new TDIS equipment, we can achieve high resolution and graceful color stone of information display. Thus high graded service are able to provide to passengers. In addition, LCD module decreases power consumption, and it can be used permanently by changing only backlight in comparison with conventional equipment. Therefore we can decrease the maintenance cost and extend durability-period of TDIS equipment using new equipment.

• 한국컴퓨터정보학회논문지
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• 제24권4호
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• pp.99-105
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• 2019

Recently, many people enjoy movies and music content through their smart devices for using public transportation like as bus or subway. However, because their concentration is aimed at content on their smart devices, passengers sometimes forget to disembark and miss their destination stations. Therefore, in this paper, we propose a destination notification system for disembarking public transport using high frequencies based on the smart devices. We tested 1,000 times real-time destination notification to performance evaluate of the proposed application and service system. According to the test results, the proposed system showed 99.4% and 99.6% accuracy and we confirmed that it could be very useful. As such, the proposed system could be a useful technology for notifying smart device users when to get off public transport, capable of global commercialization.

• 한국통신학회논문지
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• 제29권10B호
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• pp.841-848
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• 2004

네트워크 상에 장애가 발생 시에는 서비스들의 Qos 요구사항을 만족시킬 수 있는 또 다른 백업 경로를 사용하여 서비스해야 한다. 따라서 본 논문에서는 IP 네트워크 상에 발생된 단일 회선 장애를 위해 simple PFC(5-PFC) 기법과 다중 회선 장애를 위한 iterative PFC(i-PFC) 그리고 라우터와 같은 노드 장애를 복구하기 위한 fault_node Avoidance PFC(a-PFC) 기법들을 제안하고 이를 기반으로 Direct_destination Rerouting(DR) 기법을 최소 재라우팅 비용 문제를 통해 성능 비교 분석하기로 한다.

• 한국통신학회논문지
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• 제33권3B호
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• pp.152-158
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• 2008

최근 DDoS(Distributed Denial of Service) 공격이 네트워크 주요 위협요소로 부각되고 있다. 이들 공격은 주로 특정 victim에 다량의 패킷을 전송하는 특징을 가지기 때문에 발생 패킷들의 목적지 IP 주소를 모니터링하여 공격을 탐지하는 기법들이 제안되었다. 기존의 블룸 필터 탐지 기법은 구조가 간단하고 실시간 탐지가 가능한 장점을 갖지만 목적지 IP 주소의 세부 주소를 독립적으로 모니터링하므로 오탐지율이 높은 문제점을 가진다. 이러한 문제점을 해결하기 위하여 본 논문에서는 목적지 주소의 세부 주소 간 연관성을 정의하여 모니터링하는 확장된 블룸 필터 기반의 효율적인 목적지 주소 모니터링 기법을 제안한다. 제안한 기법에서는 세부 주소를 모니터링하는 테이블뿐만 아니라 세부 주소 간 연관성을 모니터링하는 추가 테이블을 유지한다. 시뮬레이션을 통한 성능 평가 결과 제안한 기법은 기존의 블룸 필터 탐지 기법보다 낮은 오탐지율을 보였다. 또한 공격 탐지 정확성 향상을 위하여 다층의 모니터링 구조를 제안하였으며, 층수와 추가 테이블의 수의 변화에 따라 정확도를 높일 수 있었다.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.342-352
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• 2021

Multicast Routings is a big challenge due to limitations such as node power and bandwidth Mobile Ad-hoc Network (MANET). The path to be chosen from the source to the destination node requires protocols. Multicast protocols support group-oriented operations in a bandwidth-efficient way. While several protocols for multi-cast MANETs have been evolved, security remains a challenging problem. Consequently, MANET is required for high quality of service measures (QoS) such infrastructure and application to be identified. The goal of a MANETs QoS-aware protocol is to discover more optimal pathways between the network source/destination nodes and hence the QoS demands. It works by employing the optimization method to pick the route path with the emphasis on several QoS metrics. In this paper safe routing is guaranteed using the Secured Multicast Routing offered in MANET by utilizing the Ant Colony Optimization (ACO) technique to integrate the QOS-conscious route setup into the route selection. This implies that only the data transmission may select the way to meet the QoS limitations from source to destination. Furthermore, the track reliability is considered when selecting the best path between the source and destination nodes. For the optimization of the best path and its performance, the optimized algorithm called the micro artificial bee colony approach is chosen about the probabilistic ant routing technique.

• 산경연구논집
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• 제9권1호
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• pp.67-76
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• 2018

Purpose - With the worldwide aging problem and the development of globalization, customers prefer to seek affordable medical services with the higher quality overseas. This new trend has urged some destination countries to improve their services for the more competitive advantages over other countries. Literature research indicate that medical quality and cost may be the key factors influencing global patients' decisions. In the international environment, however, medical tourism destinations are selected due to cultural similarity between the hosting country and the customers' own country. The more similarity perceived between the two countries leads foreign patients to choose the considering country as the destination for medical tourism. However, little research has been conducted on this topic. Thus, we empirically investigate how cultural similarity influences Chinese medical customers' choice of the destinations. We also consider the factors related to medical competency and travel attribute which might affect customers' decisions along with some moderating roles of disease types. Research design, data, and methodology - We proposed a research model in order to confirm the relations among different variables of cultural similarity, medical competency, travel attractiveness, disease types, and destination choice. The questionnaire survey is processed in the more economically developed regions of China such as Beijing, Shanghai, and Jiangsu. Conditional logit regression is applied to analyze the data of 881. Results - Results indicate that cultural similarity is the important predictor of Chinese customers' decision to select a medical country. However, the effects of cultural similarity vary according to the disease types. We also find that medical competency and travel attractiveness influence their decisions with the moderating role of disease types. Conclusions - Cultural similarity is the important factor that influences Chinese potential medical tourists' decisions to select a destination. Marketing managers should consider the effects of cultural similarity when developing strategies for attracting Chinese medical tourists. Since medical competency and travel attractiveness are still the critical key elements for them to evaluate the destination countries, it is necessary to continuously improve medical service quality and facilities. The results also recommend that medical managers should sharpen their marketing strategies by segmenting Chinese potential customers in terms of disease types.

• 한국병원경영학회지
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• 제23권2호
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• pp.28-41
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• 2018

Purpose: This study purposed to analyze the spatial accessibility of mental health institutions in Ganwon-Do using Geographic Information System and to suggest policy implications. Methodology: Network analysis was applied to assess the spatial accessibility of mental health institutions in Gangwon-Do. To perform the network analysis, network data set was built using administrative district map, road network, address of mental health institutions in Gangwon-Do. After building network data set, Two network analysis methods, 1) Service area analysis, 2) Origin Destination cost matrix were applied. Service area analysis calculated accessive areas that were within specified time. And using Origin Destination cost matrix, travel time and road travel distance were calculated between centroids of Eup, Myeon, Dong and the nearest mental health institutions. Result: After the service area analysis, it is estimated that 19.63% of the total areas in Gangwon-Do takes more than 60 minutes to get to clinic institutions. For hospital institutions, 23.08% of the total areas takes more than 60 minutes to get there. And 59.96% of Gangwon-do takes more than 30 minutes to get to general hospitals. The result of Origin-Destination cost matrix showed that most Eup Myeon Dong in Gangwon-Do was connected to the institutions in Wonju-si, Chuncheon-si, Gangneung-si. And it showed that there were large regional variation in time and distance to reach the institutions. Implication: Results showed that there were regional variations of spatial accessibility to the mental health institutions in Gangwon-Do. To solve this problem, Several policy interventions could be applied such as mental health resources allocation plan, telemedicine, providing more closely coordinated services between mental health institutions and community mental health centers to enhance the accessibility.

• 한국산학기술학회논문지
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• 제11권11호
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• pp.4251-4259
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• 2010

본 연구의 내용은 관광객의 만족을 도모할 수 있는 유비쿼터스 관광서비스 구축을 위한 크루즈관광객의 동기를 분석한 것이다. 이를 위하여 크루즈관광동기와 유비쿼터스 크루즈서비스와의 관계를 규명하고자 실증분석을 하였다. 실증분석결과에 의하면, 교육신기활동 동기와 기항지 매력추구 동기가 높을수록 크루즈 승 하선 정보 보안서비스 등에 대한 이용의도가 높은 것으로 나타났다. 크루즈관광 동기 중 사교성 동기가 높을수록 지불 결제서비스에 대한 이용의도가 높았다. 또한 기항지 매력 추구동기가 높을수록 맞춤형 서비스에 대한 이용의도가 높은 것으로 나타났다. 지금까지의 실증분석결과에서 크루즈관광 동기 중에서 가족친화성, 일상탈출성, 기항지매력추구형, 사교성, 교육신기활동추구성 등의 순으로 정도가 높게 나타났다.

• 한국콘텐츠학회논문지
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• 제17권3호
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• pp.31-41
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• 2017

최근 외래 관광객이 증가하는 추세에 한국을 방문하는 관광객들의 욕구를 충족시키고자 다양한 콘텐츠 등을 개발하고 있으며, 이러한 콘텐츠 들은 도시 관광에 있어 중요한 역할을 수행하고 있다. 관광콘텐츠 등이 관광지의 스토리텔링이외에도 관광시설, 위락, 숙박, 쇼핑 등 관광객들이 이용하는 모든 자원에 포함되고 있고 이를 경험하고 즐기는 관광활동에 대한 만족도가 중요하며 더욱 다양한 콘텐츠 개발이 필요하다고 본다. 이에 본 연구는 방한 외래 관광객을 대상으로 도시 관광에 있어서 콘텐츠만족도를 중심으로 군집분석을 통한 시장세분화를 실시하여 각 세분시장별 관광성과 및 추후행동의도에 대한 차이분석을 실시하였다. 분석결과 도시 관광콘텐츠 만족별 세분시장은 '약간만족 집단', '약간불만족 집단', '대체적만족 집단', '매우만족 집단'으로 4개 군집으로 분류되었다. 세분화된 도시 관광 콘텐츠만족집단에 대한 인구통계학적 특성 및 행동특성을 나타내는 변수들인 국적, 관광의사결정과정 및 관광유형이 있는 것으로 나타났다. 또한 도시 관광 콘텐츠만족집단에 대한 세분시장별 관광성과와 행동의도도 차이가 있는 것으로 나타났다. 이러한 연구결과는 외국인 관광객을 대상으로 문화관광지의 핵심경쟁력인 콘텐츠만족 세분시장별 특성을 파악하고 연구결과를 바탕으로 활성화방안 제시를 하였다. 이를 통하여 문화관광지로 경쟁력을 확보하는 이론적 기초를 제공하는데 의의가 있다.

• 농촌지도와개발
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• 제24권2호
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• pp.117-125
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• 2017

The service quality and image are a central factor in understanding tourists destination choice. Existing literature suggests that sport event and destination image could interact to influence tourism behaviours. The purpose of this study w as to identify the factors influencing local image and re-visit intention in the 68th Chungcheongnam-do Provincial Sport Event held in Yesan city. The results of the study are as follows; First, as a result of factor analysis on the satisfaction with the sports event composed of 17 items, three factors were categorized, which were 'event management', 'event facility' and 'supporting facilities'. Second, satisfaction with local event had a positive effect on local image. Especially, satisfaction with event management had greater effect on local image than event facilities and supporting facilities. Third, as satisfaction with local event had positive effect on re-visitation intention, satisfaction with sports event had positive effect on the success of the sport event itself and re-visitation intention for the region. Fourth, as local image had a positive effect on re-visitation intention, strategic approaches to linking factors of tourism are required to attract visitors in addition to sports events.